JP2010007159A - Copper alloy material and electrode member of welding equipment - Google Patents

Abstract

To provide a copper alloy material having high strength and high conductivity. More specifically, a copper alloy material having a conductivity of 20% IACS or higher and high hardness is provided.
A copper alloy material containing 2.7 to 3.1% by mass of Ti, the balance being Cu and inevitable impurities, the copper alloy material being hot worked after hot working. Or a copper alloy material obtained by performing cold working and warm working, and then performing an aging treatment, the working temperature in the warm working is 400 to 600 ° C., and after the solution treatment, A copper alloy material characterized in that the total degree of cold working and warm working is 20 to 90%.
[Selection figure] None

Description

  The present invention relates to a copper alloy material having high strength and high conductivity. Hereinafter, a copper alloy material having high strength and high conductivity is also referred to as a copper alloy material having high strength and high conductivity.

  For example, copper alloy materials used for electrode members of welding equipment are required to have high strength and high conductivity.

  An example of a copper alloy material that satisfies this requirement is a copper alloy material defined in JIS Z 3234. Among these, in particular, a copper alloy material conforming to JIS Z 3234 class 4 (hereinafter also simply referred to as class 4), that is, a tensile strength of 970 MPa or more, a Vickers hardness of 310 or more, and an electrical conductivity of 20 As the copper alloy material having a% IACS or higher, a Cu—Be based copper alloy material to which Be is added as a precipitation hardening element may be mentioned. There is no material.

  However, Be, which is an additive element, is an element in which fumes generated by melting during recycling are harmful to the environment. And with the recent increase in environmental protection, there is a movement to regulate the use of harmful substances, and Be may be subject to regulation. Therefore, development of a high-strength and high-conductivity copper alloy material that does not contain Be is desired.

  As a material having a strength comparable to that of CDA C17200, there is a Cu-Ti copper alloy material (JIS H3130 C1990) to which 2.9 to 3.5% of Ti is added. This is applied to a spring plate material and a strip material. The target is thin.

  Patent Documents 1 to 4 listed below disclose Cu-Ti-based copper alloy materials having high strength and high conductivity.

JP-A-6-248375 (Claims) JP-A-7-258803 (Claims) JP 2004-285408 A (Claims) JP-A-2005-344143 (Claims)

  However, the Cu—Ti copper alloy material (JIS H3130 C1990) is not applied to a thick material having a thickness of at least 2 mm, such as for electrode members of welding equipment.

  Moreover, all of the above Patent Documents 1 to 4 relate to thin plate materials, and there is a problem that they cannot be applied to thick materials such as electrode members of welding equipment.

  As described in Patent Documents 1 to 4, since the thin plate material is processed by hot and cold rolling, the degree of work can be increased, so both the strength and conductivity of the thin plate material are increased. I can.

  On the other hand, the processing of electrode members of welding equipment generally requires processing steps with a smaller degree of processing than rolling, such as hot extrusion, forging, and cold forging. is there. Moreover, even when performing a rolling process without performing a forging process, since the plate | board thickness after a process is very large compared with the said patent documents 1-4, the rolling process with a small work degree is required.

  That is, a process with a high degree of work cannot be used before the aging treatment process, which is the main process for increasing the strength of the Cu—Ti-based copper alloy material. For this reason, it is difficult to obtain a material having a good balance between high strength and high conductivity with a material having a small degree of processing such as an electrode member of a welding machine.

  Accordingly, an object of the present invention is to provide a copper alloy material having high strength and high conductivity. More specifically, an object of the present invention is to provide a copper alloy material having a conductivity of 20% IACS or higher and high hardness.

  As a result of intensive studies to solve the above-described problems in the prior art, the inventors set the Ti content to 2.7 to 3.1% by mass, and after hot working, before aging treatment. Furthermore, by performing warm processing at a processing temperature of 400 to 600 ° C., or performing cold processing and warm processing at a processing temperature of 400 to 600 ° C., the processing degree is 20 to 90%. However, the present inventors have found that a copper alloy material having a conductivity as high as 20% IACS or higher and a high hardness can be obtained, thereby completing the present invention.

That is, the present invention (1) is a copper alloy material containing 2.7 to 3.1% by mass of Ti, the balance being Cu and inevitable impurities,
The copper alloy material is a copper alloy material obtained by performing hot working, then performing warm working, or cold working and warm working, and then performing an aging treatment,
The processing temperature in the warm processing is 400 to 600 ° C.,
The total processing degree of the cold processing and the warm processing after the solution treatment is 20 to 90%,
A copper alloy material characterized by the above is provided.

  Moreover, this invention (2) provides the electrode member of the welding equipment characterized by consisting of the copper alloy material of the said invention (1).

  According to the present invention, it is possible to provide a copper alloy material having high strength and high conductivity, and more specifically, to provide a copper alloy material having a conductivity of 20% IACS or higher and high hardness. it can.

The copper alloy material of the present invention is a copper alloy material containing 2.7 to 3.1% by mass of Ti and composed of the balance Cu and inevitable impurities,
The copper alloy material is a copper alloy material obtained by performing hot working, then performing warm working, or cold working and warm working, and then performing an aging treatment,
The processing temperature in the warm processing is 400 to 600 ° C.,
It is a copper alloy material having a total work degree of 20 to 90% in the cold work and the warm work after the solution treatment.

  The copper alloy material of the present invention is a Ti-copper alloy material that contains Ti and consists of the remainder Cu and inevitable impurities. The content of Ti in the copper alloy material of the present invention is 2.7 to 3.1% by mass, preferably 2.8 to 3.0% by mass. When the Ti content is within the above range, the copper alloy material has high strength and high conductivity. On the other hand, when the Ti content is less than the above range, the strength of the copper alloy material is low, and when it exceeds the above range, the conductivity of the copper alloy material is low.

  The copper alloy material of the present invention is a copper alloy material obtained by sequentially performing hot working and aging treatment after hot working, or copper obtained by sequentially carrying out cold working, warm working and aging treatment after hot working. Alloy material. In the copper alloy material of the present invention, the hot working and the aging treatment are performed after the hot working, which means that the hot working is performed immediately after the hot working. Rather, it means that the warm working and the aging treatment are sequentially performed in the step after the hot working. Alternatively, in the copper alloy material of the present invention, the cold working, the warm working, and the aging treatment are performed after the hot working, which is performed immediately after the hot working. It does not mean that the cold working, the warm working and the aging treatment are sequentially carried out in the step after the hot working.

  In order to obtain the copper alloy material of the present invention, first, a copper alloy ingot adjusted to a predetermined component content is hot-worked to obtain a hot-worked material.

  Examples of the hot working include hot forging, hot extrusion, hot rolling and the like. The processing temperature of the hot processing is usually 700 to 950 ° C, preferably 850 to 900 ° C. A method for obtaining the ingot processed by the hot working is not particularly limited. The Ti content in the ingot is 2.7 to 3.1% by mass, preferably 2.8 to 3.0% by mass.

Next, the copper alloy material of the present invention is obtained by the following (1) to (4).
(1) Immediately after the hot working, the hot working material obtained by the hot working is quenched, and then the warm working and the aging treatment are performed.
(2) After the hot working, once the temperature of the hot worked material obtained by the hot working is lowered, the temperature is raised again to perform solution treatment and quenching of the hot worked material, The warm working and the aging treatment are performed.
(3) Immediately after the hot working, the hot worked material obtained by the hot working is quenched, and then the cold working, the warm working and the aging treatment are performed.
(4) After the hot working, once the temperature of the hot work material obtained by the hot work is lowered, the temperature is raised again to perform solution treatment and quenching of the hot work material, The cold working, the warm working and the aging treatment are performed.
In the case of (1) and (3), in order to set the temperature immediately before quenching to 700 ° C. or higher, considering the handling time of the material, the processing temperature of the hot processing is just after the hot processing. A temperature at which the temperature of the material is 750 ° C. is preferred. Further, in the case of (1), after the hot working material is quenched, it can be chamfered before the hot working, and in the case of (3), the hot working After quenching the material, it can be chamfered before the cold working. In the case of (1) and (3), the hot working also serves as a solution treatment.
In the case of (2) and (4), after the temperature of the hot-worked material is once lowered, treatment or processing such as chamfering or cold working can be performed before the solution treatment.

  That is, in the case of (1) and (2), the quenched material after the quenching is warm processed to obtain a warm processed material. In the case of (3) and (4), the quenched material after the quenching was cold worked to obtain a cold worked material, and then the cold worked was performed. The subsequent cold-worked material is warm-worked to obtain a warm-worked material.

  In the case of (3) and (4), the cold working is performed before the warm working. Examples of the cold working include cold forging and cold rolling. The number of times of cold working may be one time or may be divided into two or more times.

  In the case of (1) and (2), the quenching material obtained by performing the quenching is warm-worked, and in the case of (3) and the case of (4) The cold-worked material obtained by performing the cold work is warm-worked to obtain the warm-worked material. The warm work is performed in a temperature range of room temperature or higher and lower than the recrystallization temperature. Say processing. In the warm working related to the copper alloy material of the present invention, the working is performed in a temperature range in which age hardening can occur in the aging treatment, particularly in a temperature range in which strength increase (hardening) occurs in the initial stage of the aging treatment. The processing temperature of the warm processing is 400 to 600 ° C. When the processing temperature of the warm processing is within the above range, the copper alloy material has high strength and high conductivity. On the other hand, when the processing temperature of the warm processing is less than the above range, the conductivity of the copper alloy material is low, and when it exceeds the above range, the strength of the copper alloy material is low. The number of times of performing the warm working may be one time or may be divided into two or more times.

  Examples of the warm working include warm forging and warm rolling. When the finished shape in the primary processing is a plate material, the warm rolling is often selected, and when the shape is a bar, a shape, or a part shape, the warm forging is usually selected. In the copper alloy material of the present invention, a copper alloy material having high strength and high conductivity cannot be obtained unless the warm working is performed.

  Next, the warm-worked material is aged to obtain the copper alloy material of the present invention. The treatment temperature of the aging treatment is 300 to 500 ° C., and the treatment time of the aging treatment is 0.5 to 12 hours.

In the case of (1) and (2), when performing the warm processing on the quenching material after the solution treatment and the quenching, the warm processing on the quenching material is performed. The total degree of processing is 20-90%. That is, in the case of (1), since the hot working also serves as a solution treatment, the warm working performed after the quenching on the quenched material immediately after the hot working is performed. The total processing degree is 20 to 90%. In the case of (2), the total degree of processing of the warm processing performed after the quenching on the quenched material after quenching performed after the solution treatment is 20 to 90%.
In the cases of (3) and (4), the quenching is performed when the cold working and the warm working are sequentially performed on the quenching material after the solution treatment and the quenching. The total degree of cold working and warm working on the material is 20-90%. That is, in the case of (3), since the hot working also serves as a solution treatment, the cold working performed after the quenching on the quenched material immediately after the hot working is performed. And the total degree of processing of this warm processing is 20 to 90%. In the case of (4), the total degree of processing of the cold processing and the warm processing performed after the quenching on the quenched material after the quenching performed after the solution treatment is 20 to 90%. It is.
In the present invention, in the case of (1) and (2), the total degree C of warm working on the quenching material is the sectional area of the quenching material before the warm working. When A (cm ² ) and the cross-sectional area of the warm-worked material after the warm working are B (cm ² ), the following formula:
Total processing degree C (%) = {(A−B) / A} × 100 (5)
This is the value obtained by.
In the present invention, in the case of (3) and (4), the total degree C of cold working and warm working on the quenching material is the quenching before cold working. When the cross-sectional area of the material is A (cm ² ) and the cross-sectional area of the warm-worked material after the warm working is B (cm ² ), the following formula:
Total processing degree C (%) = {(A−B) / A} × 100 (5)
This is the value obtained by.
In the case of (2) and (4), cold work can be performed before the solution treatment, but the strain in the cold work performed before the solution treatment is It can be taken by the subsequent solution treatment. And this invention makes the total process degree in the state which cannot take the distortion after performing solution treatment into a specific range. Therefore, in the cases of (2) and (4), the degree of work in the cold work performed before the solution treatment is not included in the total degree of work (C).

  Taking the case of performing the cold working and the warm working of (3) and (4) as an example, the cross-sectional area A of the quenched material, and the cross-sectional area B of the warm worked material after the warm working Will be described with reference to FIGS. 1 to 3 are schematic perspective views showing the state before and after performing the cold working and the warm working. In addition, as a process of FIG. 1, a rolling is given as an example, As a process of FIG. 2, free forging is mentioned as an example, and a die forge is mentioned as a process of FIG. In FIG. 1, a warm processed material 3 is obtained by applying processing (the cold processing and the warm processing) in the processing direction 2 to the quenching material 1. Here, the area of the cross-section 4 when the quenching material 1 is cut in a plane parallel to the processing direction 2 is defined as the cross-sectional area A of the quenching material before cold working, and the processing direction 2, the area of the cross section 5 when the warm processed material 3 is cut is defined as a cross-sectional area B of the warm processed material after the warm processing. Further, in FIG. 2, a warm processed material 13 is obtained by applying processing (the cold processing and warm processing) in the processing direction 12 to the quenching material 11. Here, the area of the cross-section 14 when the quenching material 11 is cut in a plane parallel to the processing direction 12 is defined as a cross-sectional area A of the quenching material before the cold processing, and the processing direction 12, the area of the cross section 15 when the warm processed material 13 is cut is a cross-sectional area B of the warm processed material after the warm processing.

Further, in FIG. 3, a warm processed material 23 is obtained by performing processing (the cold processing and warm processing) in the processing direction 22 on the quenching material 21. Reference numeral 211 denotes a cross section of the quenching material 21 when cut along a plane parallel to the machining direction 22, and reference numeral 231 denotes the warm machining when cut along a plane parallel to the machining direction 22. 3 is a cross section of the material 23; In the processing shown in FIG. 3, the total processing degree C varies depending on the position of the warm processed material 23. FIG. 4 is a diagram in which the cross-section of the quenching material 21 and the cross-section of the warm-working material 23 are overlapped at the respective centers 24, and a dotted line 29 indicates the contour of the quenching material 21, and a solid line Reference numeral 30 denotes an outline of the warm processed material 23. When the position indicated by reference numeral 25 in the warm processed material 23 is compared with the position indicated by reference numeral 27, the position of reference numeral 27 is on the inner side. However, the total processing degree C becomes high. In the present invention, when the total work degree C differs depending on the position of the warm work material, the total work degree C at the position where the total work degree C is the lowest is the highest. The total degree of processing C at the higher position is also in the range of 20 to 90%. The total degree of processing C when the total degree of processing C differs depending on the position of the warm processed material is determined for each position when the center of the warm processed material is overlapped with the center of the quenched material. An area similar in shape to the quenching material whose outline overlaps with each position of the warm-working material and whose center overlaps with the quenching material and the center of the warm-working material, As the cross-sectional area B of the work material, the total work degree C at each position is obtained by the above equation (5). For example, in FIG. 4, the centers of the quenching material 21 and the warm-worked material are overlapped by reference numeral 24, and the point where the extension line 24 and reference numeral 25 overlaps the outline 29 is indicated by reference numeral 26. The area of the circle whose center overlaps with the reference numeral 24 is obtained, and this is defined as the cross-sectional area B of the warm-worked material after the warm-working. The radius of the circle and the center contour overlaps the code 25 overlaps the code 24, the distance of the code 24 and code 25, i.e., the sign a _1, the radius of the hardened material 21, reference numeral 24 and reference numeral 26 , That is, the code b ₁ . Then, since A = πa ₁ ² and B = πb ₁ ² , the total processing degree C ₁ = {(πa ₁ ² −πb ₁ ² ) / πb ₁ ² } × 100 = {(a ₁ ² −b ₁ ² ) / b ₁ ² } × 100. Further, even if the cross-sectional shape of the quenching material is not circular, but is a rectangle or other shapes, when the center of the warm processing material is overlapped with the center of the quenching material, the contour is warm processing. The area of the shape similar to that of the quenched material that overlaps the position of the material and the center overlaps the center of the quenched material and the warm processed material is defined as a cross-sectional area B of the warm processed material after the warm working. The total degree C of processing of each position of the warm work material is obtained by the above formula (5). For example, when the cross-sectional shape is rectangular, the area of the rectangular shape similar to the quenching material whose outline overlaps with the position of the warm processing material and the center overlaps with the quenching material and the center of the warm processing material, As the cross-sectional area B of the warm-worked material after the warm working, the total working degree C at each position is obtained by the above formula (5).

  In the cases of (1) and (2), when the warm working is performed twice or more, the warm worked material after all the warm working is compared with the quenching material. Then, the total working degree of the warm working on the quenching material is obtained.

In the case of (3) and (4), the cold work material is compared with the hardened material after both the cold work and the warm work and the hardened material. The total working degree of the hot working and the warm working is obtained. Further, when the cold working is performed twice or more, or when the warm working is performed twice or more, all the cold working and the warm working material after the warm working is performed, and the baking The total degree of processing of the cold working and the warm working on the quenching material is obtained in comparison with the filling material. At this time, the amount of processing in each step of the cold processing and the warm processing is the quenching material before the cold processing, and after the cold processing and the warm processing. The degree of workability is appropriately selected between the warm processed material and the range of 20 to 90%. Preferably, the degree of processing in the warm processing, that is, the degree of processing in the warm processing on the cold-worked material before the warm processing is 10% or more. In the present invention, the degree of work F in the warm working with respect to the cold work material is defined as D (cm ² ), the cross-sectional area of the cold work material before the warm work, When the cross-sectional area of the warm processed material is E (cm ² ), the following formula:
Degree of processing F (%) = {(DE) / D} × 100
This is the value obtained by.

Below, the form example of a process and a process until the copper alloy material of this invention is obtained is shown. However, the present invention is not limited to this.
(I) Hot working → quenching → warm working → aging treatment (ii) Hot working → cooling → solution treatment and quenching → warm working → aging treatment (iii) hot working → cooling → cold working → Solution treatment and quenching → Warm processing → Aging treatment (iv) Hot processing → Quenching → Cold processing (one or more times) → Warm processing → Aging treatment (v) Hot processing → Cooling → Solution treatment and quenching → Cold processing (one or more times) → Warm processing → Aging treatment (vi) Hot processing → Cooling → Cold processing (first time) → Solution treatment and quenching → Cold work (second time) → Warm work → Aging treatment Although it is the case of (iii), as described above, the strain of the cold work before the solution treatment can be taken by the subsequent solution treatment. The degree of cold work in (iii) is not included in the total degree of work C, and the total degree of work in the warm work is The total processing degree is C. Similarly, in the case of (vi), since the strain of cold working before the solution treatment can be taken by the subsequent solution treatment, the degree of work of the cold work (first time) of (vi) is The total work degree C is not included in the total work degree C, and the total work degree after the cold work (second time) and the warm work is defined as the total work degree C.
In the cases (i), (ii), and (iii), chamfering can be performed between hot working and warm working. In the case of (iv), (v) and (vi), chamfering can be performed between hot working and cold working.

  The copper alloy material of the present invention has a Ti content in the copper alloy material of 2.7 to 3.1% by mass, preferably 2.8 to 3.0% by mass, and the quenching material. Or by performing the warm working at a working temperature of 400 to 600 ° C. on the cold-worked material obtained by the cold working after quenching. Become a material. That is, in the present invention, a specific processing temperature for the Ti content within a specific range and for the quenched material or for the cold worked material obtained by the cold working after the quenching. By combining both the warm working and the copper alloy material, the effect of making the copper alloy material high strength and high conductivity is exhibited.

  As a result, the copper alloy material of the present invention has a high conductivity of 20% IACS or more even when the total degree of cold working and warm working of the quenching material is as low as 20 to 90%. In addition, the material has high hardness, preferably high Vickers hardness of 285 or more, and has a high balance between high strength and high conductivity.

  Therefore, the copper alloy material of the present invention is suitably used as a copper alloy material for electrode members of welding equipment, which replaces the conventional Cu—Be based copper alloy material (CDA C17200).

  The copper alloy material of the present invention is obtained by performing the aging treatment and is a primary processed material. Examples of the shape of the copper alloy material of the present invention include a plate material, a bar material, a die material, and a forging material having a thickness of 2 mm or more. And the electrode member of a welding apparatus is manufactured using the copper alloy material of this invention.

  EXAMPLES Next, although an Example is given and this invention is demonstrated more concretely, this is only an illustration and does not restrict | limit this invention.

(Examples and Comparative Examples)
<Manufacturing method>
After performing the casting and hot working shown below, perform any one of Step 1, Step 2, Step 3, Step 4 or Step 5, and then, among aging treatment 1, aging treatment 2 or aging treatment 3 The aging treatment of either of was performed.
Casting-> hot working-> step 1, step 2, step 3, step 4 or step 5-> aging treatment 1, aging treatment 2 or aging treatment 3
Table 1 shows which of Step 1, Step 2, Step 3, Step 4 or Step 5 was performed and which of Ageing Treatment 1, Ageing Treatment 2 or Ageing Treatment 3 was performed.

(casting)
Using Cu and Ti ingots, alloy components with the Ti content shown in Table 1 were blended, and after manufacturing a φ100 mm ingot using a high frequency melting furnace, it was peeled to φ90 mm and cut to 90 mm in length. Ingot A was obtained.
(Hot processing)
The obtained 90 mm ingot A was forged at 850 ± 50 ° C. to a length of 30 mm to obtain a hot forged material B (hot work material).
(Process 1)
The hot forging material B was chamfered to a thickness of 20 mm. Next, the hot forged material B having a thickness of 20 mm was subjected to a solution treatment at 850 ° C. for 1 hour, and then quenched in water to obtain a quenched material C1.
Subsequently, the quenching material C1 was cold-rolled to the thickness shown in Table 1 with the workability shown in Table 1 to obtain a cold-rolled material D1 (cold-working material).
Next, the cold-rolled material D1 was warm forged to a final thickness shown in Table 1 at a working degree shown in Table 1 at 550 ° C. to obtain a warm-forged material E1 (warm-worked material).
(Process 2)
Immediately after hot forging, the hot forged material B was quenched in water to obtain a quenched material C2. Next, the quenching material C2 was chamfered to a thickness of 20 mm.
Subsequently, this quenching material C2 was cold-rolled to the thickness shown in Table 1 with the workability shown in Table 1, and cold-rolled material D2 (cold-working material) was obtained.
Next, the cold-rolled material D2 was warm-forged to a final thickness shown in Table 1 at a working degree shown in Table 1 at 550 ° C. to obtain a warm-forged material E2 (warm-worked material).
(Process 3)
The hot forging material B was chamfered to a thickness of 20 mm. Next, the hot forged material B having a thickness of 20 mm was subjected to a solution treatment at 850 ° C. for 1 hour, and then quenched in water to obtain a quenched material C3.
Next, the quenching material C3 was cold-rolled to the thickness shown in Table 1 with the workability shown in Table 1 to obtain a cold-rolled material D3.
(Process 4)
The hot forging material B was chamfered to a thickness of 20 mm. Next, the hot forged material B having a thickness of 20 mm was subjected to a solution treatment at 850 ° C. for 1 hour, and then quenched in water to obtain a quenched material C4.
Next, the quenching material C4 was warm forged to a final thickness shown in Table 1 at a working degree shown in Table 1 at 550 ° C. to obtain a warm forged material E4 (warm processed material).
(Process 5)
Immediately after hot forging, the hot forged material B was quenched in water to obtain a quenched material C5. Next, the quenched material C5 was chamfered to a thickness of 20 mm.
Next, the quenched material C5 was warm forged to a final thickness shown in Table 1 at a working degree shown in Table 1 at 550 ° C. to obtain a warm forged material E5 (warm processed material).
(Aging treatment)
The warm forged material E1 obtained in step 1, the warm forged material E2 obtained in step 2, the cold rolled material D3 obtained in step 3, the warm forged material E4 obtained in step 4, or the step No. 5 shown in Table 1 shows the warm forged material E5 obtained in No. 5. A copper alloy material F was obtained by aging treatment under the following conditions.
Aging treatment 1: 400 ° C., 4 hours Aging treatment 2: 300 ° C., 8 hours Aging treatment 3: 500 ° C., 2 hours

<Evaluation of copper alloy material>
The following evaluation was performed on the copper alloy material F (primary processed material) obtained after the aging treatment. The results are shown in Table 2.
(1) Hardness test Vickers hardness was measured according to JIS Z 2244.
A sample having a Vickers hardness of 285 or more was designated as “◯”, and a sample having a Vickers hardness of less than 285 was designated as “x”.
(2) Measurement of conductivity The conductivity was measured with a sigma tester.
A sample having a conductivity of 20% IACS or higher was indicated by “◯”, and a value of less than 20% IACS was indicated by “x”.

１）総加工度：工程１又は工程２の冷間加工及び温間加工の全工程の合計加工度、あるいは、工程３の冷間加工の加工度、あるいは、工程３又は工程４の温間加工の加工度

1) Total working degree: Total working degree of all processes of cold working and warm working in step 1 or step 2, or working degree of cold working in step 3, or warm working in step 3 or step 4. Processing degree

<Evaluation results>
Test No. As for 1-8, both hardness and electrical conductivity were high.
Test No. No. 9 had a low hardness because the Ti content was too low.
Test No. No. 10 had a low electrical conductivity because the Ti content was too high.
Test No. No. 11 has low hardness and electrical conductivity, and it is clear that even when the aging treatment conditions are changed and the hardness is increased, the electrical conductivity is lower than 20% IACS. 11, it was found that if the total workability is too low, both hardness and conductivity cannot be increased.
Test No. No. 12, although the conductivity is 20% IACS, the hardness is low, and it is clear that when the aging treatment conditions are changed and the hardness is increased, the conductivity becomes lower than 20% IACS. From No. 12, it was found that both the hardness and the electrical conductivity cannot be increased if the total workability is too high.
Test No. No. 13 had low electrical conductivity because there was no warm working.

  According to the present invention, a copper alloy material having high strength and high conductivity can be produced, and therefore a copper alloy material for an electrode member of a welding apparatus that is required to be replaced with a Cu-Be based copper alloy material is provided. be able to.

It is a typical perspective view which shows the mode before and after performing this cold working and this warm working. It is a typical perspective view which shows the mode before and after performing this cold working and this warm working. It is a typical perspective view which shows the mode before and after performing this cold working and this warm working. FIG. 4 is a diagram in which the cross section of the quenching material 21 shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hardening material 2 Processing direction 3 Warm processing material 4 Cross section of hardening material 5 Cross section of warm processing material 11 Hardening material 12 Processing direction 13 Warm processing material 14 Cross section of hardening material 15 Cross section of warm processing material 21 Hardening material 22 Processing direction 23 Warm processing material 24 Center 25, 27 Position of warm processing material 29 Contour outline of quenching material 30 Contour outline of warm processing material 211 Cross section 231 of quenching material Warm processing Cross section of material

Claims (3)

It is a copper alloy material containing 2.7 to 3.1% by mass of Ti and composed of the balance Cu and inevitable impurities,
The copper alloy material is a copper alloy material obtained by performing hot working, then performing warm working, or cold working and warm working, and then performing an aging treatment,
The processing temperature in the warm processing is 400 to 600 ° C.,
The total processing degree of the cold processing and the warm processing after the solution treatment is 20 to 90%,
Features copper alloy material.   2. The copper alloy material according to claim 1, wherein the Vickers hardness is 285 or more and the electric conductivity is 20% IACS or more.   An electrode member for welding equipment, comprising the copper alloy material according to claim 1.

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